Avid Foursquare user @MikeBloomberg has declared 4/16 "Foursquare Day" in recognition of the startup's founding and growth in NYC.

The success of companies like Foursquare, which was started in New York City, shows that New York has become one of the best places in the country for the tech industry. From a network of business incubators to the new applied sciences campus of Cornell University and the Technion Institute of Technology, New York is on its way to becoming tech capital of the world.